using System;
using System.Text;
using System.Runtime.InteropServices;
using System.Security;
using System.ComponentModel;
using System.Drawing.Printing;
namespace ww.form.wwf.print
{
 
    public class Printer
    {
        private Printer()
        {

        }

        #region API

        [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
        internal struct structPrinterDefaults
        {
            [MarshalAs(UnmanagedType.LPTStr)]
            public String pDatatype;
            public IntPtr pDevMode;
            [MarshalAs(UnmanagedType.I4)]
            public int DesiredAccess;
        };

        [DllImport("winspool.Drv", EntryPoint = "OpenPrinter", SetLastError = true,
             CharSet = CharSet.Unicode, ExactSpelling = false, CallingConvention = CallingConvention.StdCall),
        SuppressUnmanagedCodeSecurityAttribute()]
        internal static extern bool OpenPrinter([MarshalAs(UnmanagedType.LPTStr)]
            string printerName,
            out IntPtr phPrinter,
            ref structPrinterDefaults pd);

        [DllImport("winspool.Drv", EntryPoint = "ClosePrinter", SetLastError = true,
             CharSet = CharSet.Unicode, ExactSpelling = false,
             CallingConvention = CallingConvention.StdCall), SuppressUnmanagedCodeSecurityAttribute()]
        internal static extern bool ClosePrinter(IntPtr phPrinter);

        [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
        internal struct structSize
        {
            public Int32 width;
            public Int32 height;
        }

        [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
        internal struct structRect
        {
            public Int32 left;
            public Int32 top;
            public Int32 right;
            public Int32 bottom;
        }

        [StructLayout(LayoutKind.Explicit, CharSet = CharSet.Unicode)]
        internal struct FormInfo1
        {
            [FieldOffset(0), MarshalAs(UnmanagedType.I4)]
            public uint Flags;
            [FieldOffset(4), MarshalAs(UnmanagedType.LPWStr)]
            public String pName;
            [FieldOffset(8)]
            public structSize Size;
            [FieldOffset(16)]
            public structRect ImageableArea;
        };

        [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
        internal struct structDevMode
        {
            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 32)]
            public String
dmDeviceName;
            [MarshalAs(UnmanagedType.U2)]
            public short dmSpecVersion;
            [MarshalAs(UnmanagedType.U2)]
            public short dmDriverVersion;
            [MarshalAs(UnmanagedType.U2)]
            public short dmSize;
            [MarshalAs(UnmanagedType.U2)]
            public short dmDriverExtra;
            [MarshalAs(UnmanagedType.U4)]
            public int dmFields;
            [MarshalAs(UnmanagedType.I2)]
            public short dmOrientation;
            [MarshalAs(UnmanagedType.I2)]
            public short dmPaperSize;
            [MarshalAs(UnmanagedType.I2)]
            public short dmPaperLength;
            [MarshalAs(UnmanagedType.I2)]
            public short dmPaperWidth;
            [MarshalAs(UnmanagedType.I2)]
            public short dmScale;
            [MarshalAs(UnmanagedType.I2)]
            public short dmCopies;
            [MarshalAs(UnmanagedType.I2)]
            public short dmDefaultSource;
            [MarshalAs(UnmanagedType.I2)]
            public short dmPrintQuality;
            [MarshalAs(UnmanagedType.I2)]
            public short dmColor;
            [MarshalAs(UnmanagedType.I2)]
            public short dmDuplex;
            [MarshalAs(UnmanagedType.I2)]
            public short dmYResolution;
            [MarshalAs(UnmanagedType.I2)]
            public short dmTTOption;
            [MarshalAs(UnmanagedType.I2)]
            public short dmCollate;
            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 32)]
            public String dmFormName;
            [MarshalAs(UnmanagedType.U2)]
            public short dmLogPixels;
            [MarshalAs(UnmanagedType.U4)]
            public int dmBitsPerPel;
            [MarshalAs(UnmanagedType.U4)]
            public int dmPelsWidth;
            [MarshalAs(UnmanagedType.U4)]
            public int dmPelsHeight;
            [MarshalAs(UnmanagedType.U4)]
            public int dmNup;
            [MarshalAs(UnmanagedType.U4)]
            public int dmDisplayFrequency;
            [MarshalAs(UnmanagedType.U4)]
            public int dmICMMethod;
            [MarshalAs(UnmanagedType.U4)]
            public int dmICMIntent;
            [MarshalAs(UnmanagedType.U4)]
            public int dmMediaType;
            [MarshalAs(UnmanagedType.U4)]
            public int dmDitherType;
            [MarshalAs(UnmanagedType.U4)]
            public int dmReserved1;
            [MarshalAs(UnmanagedType.U4)]
            public int dmReserved2;
        }

        [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
        internal struct PRINTER_INFO_9
        {
            public IntPtr pDevMode;
        }

        [DllImport("winspool.Drv", EntryPoint = "AddFormW", SetLastError = true,
             CharSet = CharSet.Unicode, ExactSpelling = true,
             CallingConvention = CallingConvention.StdCall), SuppressUnmanagedCodeSecurityAttribute()]
        internal static extern bool AddForm(
         IntPtr phPrinter,
            [MarshalAs(UnmanagedType.I4)] int level,
         ref FormInfo1 form);

        [DllImport("winspool.Drv", EntryPoint = "DeleteForm", SetLastError = true,
             CharSet = CharSet.Unicode, ExactSpelling = false, CallingConvention = CallingConvention.StdCall),
        SuppressUnmanagedCodeSecurityAttribute()]
        internal static extern bool DeleteForm(
         IntPtr phPrinter,
            [MarshalAs(UnmanagedType.LPTStr)] string pName);

        [DllImport("kernel32.dll", EntryPoint = "GetLastError", SetLastError = false,
             ExactSpelling = true, CallingConvention = CallingConvention.StdCall),
        SuppressUnmanagedCodeSecurityAttribute()]
        internal static extern Int32 GetLastError();

        [DllImport("GDI32.dll", EntryPoint = "CreateDC", SetLastError = true,
             CharSet = CharSet.Unicode, ExactSpelling = false,
             CallingConvention = CallingConvention.StdCall),
        SuppressUnmanagedCodeSecurityAttribute()]
        internal static extern IntPtr CreateDC([MarshalAs(UnmanagedType.LPTStr)]
            string pDrive,
            [MarshalAs(UnmanagedType.LPTStr)] string pName,
            [MarshalAs(UnmanagedType.LPTStr)] string pOutput,
            ref structDevMode pDevMode);

        [DllImport("GDI32.dll", EntryPoint = "ResetDC", SetLastError = true,
             CharSet = CharSet.Unicode, ExactSpelling = false,
             CallingConvention = CallingConvention.StdCall),
        SuppressUnmanagedCodeSecurityAttribute()]
        internal static extern IntPtr ResetDC(
         IntPtr hDC,
         ref structDevMode
            pDevMode);

        [DllImport("GDI32.dll", EntryPoint = "DeleteDC", SetLastError = true,
             CharSet = CharSet.Unicode, ExactSpelling = false,
             CallingConvention = CallingConvention.StdCall),
        SuppressUnmanagedCodeSecurityAttribute()]
        internal static extern bool DeleteDC(IntPtr hDC);

        [DllImport("winspool.Drv", EntryPoint = "SetPrinterA", SetLastError = true,
            CharSet = CharSet.Auto, ExactSpelling = true,
            CallingConvention = CallingConvention.StdCall), SuppressUnmanagedCodeSecurityAttribute()]
        internal static extern bool SetPrinter(
           IntPtr hPrinter,
           [MarshalAs(UnmanagedType.I4)] int level,
           IntPtr pPrinter,
           [MarshalAs(UnmanagedType.I4)] int command);

        /*
         LONG DocumentProperties(
           HWND hWnd,               // handle to parent window 
           HANDLE hPrinter,         // handle to printer object
           LPTSTR pDeviceName,      // device name
           PDEVMODE pDevModeOutput, // modified device mode
           PDEVMODE pDevModeInput,  // original device mode
           DWORD fMode              // mode options
           );
         */
        [DllImport("winspool.Drv", EntryPoint = "DocumentPropertiesA", SetLastError = true,
        ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]
        internal static extern int DocumentProperties(
           IntPtr hwnd,
           IntPtr hPrinter,
           [MarshalAs(UnmanagedType.LPStr)] string pDeviceName,
           IntPtr pDevModeOutput,
           IntPtr pDevModeInput,
           int fMode
           );

        [DllImport("winspool.Drv", EntryPoint = "GetPrinterA", SetLastError = true,
        ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]
        internal static extern bool GetPrinter(
           IntPtr hPrinter,
           int dwLevel,
           IntPtr pPrinter,
           int dwBuf,
           out int dwNeeded
           );

        [Flags]
        internal enum SendMessageTimeoutFlags : uint
        {
            SMTO_NORMAL = 0x0000,
            SMTO_BLOCK = 0x0001,
            SMTO_ABORTIFHUNG = 0x0002,
            SMTO_NOTIMEOUTIFNOTHUNG = 0x0008
        }
        const int WM_SETTINGCHANGE = 0x001A;
        const int HWND_BROADCAST = 0xffff;

        [DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Auto)]
        internal static extern IntPtr SendMessageTimeout(
           IntPtr windowHandle,
           uint Msg,
           IntPtr wParam,
           IntPtr lParam,
           SendMessageTimeoutFlags flags,
           uint timeout,
           out IntPtr result
           );






        //EnumPrinters
        [DllImport("winspool.drv", CharSet = CharSet.Auto, SetLastError = true)]
        private static extern bool EnumPrinters(PrinterEnumFlags Flags, string Name, uint Level,
            IntPtr pPrinterEnum, uint cbBuf,
        ref uint pcbNeeded, ref uint pcReturned);

        [StructLayout(LayoutKind.Sequential)]
        internal struct PRINTER_INFO_2
        {
            public string pServerName;
            public string pPrinterName;
            public string pShareName;
            public string pPortName;
            public string pDriverName;
            public string pComment;
            public string pLocation;
            public IntPtr pDevMode;
            public string pSepFile;
            public string pPrintProcessor;
            public string pDatatype;
            public string pParameters;
            public IntPtr pSecurityDescriptor;
            public uint Attributes;
            public uint Priority;
            public uint DefaultPriority;
            public uint StartTime;
            public uint UntilTime;
            public uint Status;
            public uint cJobs;
            public uint AveragePPM;
        }

        [FlagsAttribute]
        internal enum PrinterEnumFlags
        {
            PRINTER_ENUM_DEFAULT = 0x00000001,
            PRINTER_ENUM_LOCAL = 0x00000002,
            PRINTER_ENUM_CONNECTIONS = 0x00000004,
            PRINTER_ENUM_FAVORITE = 0x00000004,
            PRINTER_ENUM_NAME = 0x00000008,
            PRINTER_ENUM_REMOTE = 0x00000010,
            PRINTER_ENUM_SHARED = 0x00000020,
            PRINTER_ENUM_NETWORK = 0x00000040,
            PRINTER_ENUM_EXPAND = 0x00004000,
            PRINTER_ENUM_CONTAINER = 0x00008000,
            PRINTER_ENUM_ICONMASK = 0x00ff0000,
            PRINTER_ENUM_ICON1 = 0x00010000,
            PRINTER_ENUM_ICON2 = 0x00020000,
            PRINTER_ENUM_ICON3 = 0x00040000,
            PRINTER_ENUM_ICON4 = 0x00080000,
            PRINTER_ENUM_ICON5 = 0x00100000,
            PRINTER_ENUM_ICON6 = 0x00200000,
            PRINTER_ENUM_ICON7 = 0x00400000,
            PRINTER_ENUM_ICON8 = 0x00800000,
            PRINTER_ENUM_HIDE = 0x01000000
        }

        //Printer Status
        [FlagsAttribute]
        internal enum PrinterStatus
        {
            PRINTER_STATUS_BUSY                 =       0x00000200,
            PRINTER_STATUS_DOOR_OPEN            =       0x00400000,
            PRINTER_STATUS_ERROR                =       0x00000002,
            PRINTER_STATUS_INITIALIZING         =       0x00008000,
            PRINTER_STATUS_IO_ACTIVE            =       0x00000100,
            PRINTER_STATUS_MANUAL_FEED          =       0x00000020,
            PRINTER_STATUS_NO_TONER             =       0x00040000,
            PRINTER_STATUS_NOT_AVAILABLE        =       0x00001000,
            PRINTER_STATUS_OFFLINE              =       0x00000080,
            PRINTER_STATUS_OUT_OF_MEMORY        =       0x00200000,
            PRINTER_STATUS_OUTPUT_BIN_FULL      =       0x00000800,
            PRINTER_STATUS_PAGE_PUNT            =       0x00080000,
            PRINTER_STATUS_PAPER_JAM            =       0x00000008,
            PRINTER_STATUS_PAPER_OUT            =       0x00000010,
            PRINTER_STATUS_PAPER_PROBLEM        =       0x00000040,
            PRINTER_STATUS_PAUSED               =       0x00000001,
            PRINTER_STATUS_PENDING_DELETION     =       0x00000004,
            PRINTER_STATUS_PRINTING             =       0x00000400,
            PRINTER_STATUS_PROCESSING           =       0x00004000,
            PRINTER_STATUS_TONER_LOW            =       0x00020000,
            PRINTER_STATUS_USER_INTERVENTION    =       0x00100000,
            PRINTER_STATUS_WAITING              =       0x20000000,
            PRINTER_STATUS_WARMING_UP           =       0x00010000
        }







        //GetDefaultPrinter
        [DllImport("winspool.drv", CharSet = CharSet.Auto, SetLastError = true)]
        internal static extern bool GetDefaultPrinter(StringBuilder pszBuffer, ref int size);


        //SetDefaultPrinter
        [DllImport("winspool.drv", CharSet = CharSet.Auto, SetLastError = true)]
        internal static extern bool SetDefaultPrinter(string Name);


        //EnumFormsA
        [DllImport("winspool.drv", EntryPoint = "EnumForms")]
        internal static extern int EnumFormsA(IntPtr hPrinter, int Level, ref byte pForm, int cbBuf, ref int pcbNeeded, ref int pcReturned);  


        
        #endregion
        
        internal static int GetPrinterStatusInt(string PrinterName)
        {
            int intRet = 0;
            IntPtr hPrinter;
            structPrinterDefaults defaults = new structPrinterDefaults();

            if (OpenPrinter(PrinterName, out hPrinter, ref defaults))
            {
                int cbNeeded = 0;
                bool bolRet = GetPrinter(hPrinter, 2, IntPtr.Zero, 0, out cbNeeded);
                if (cbNeeded > 0)
                {
                    IntPtr pAddr = Marshal.AllocHGlobal((int)cbNeeded);
                    bolRet = GetPrinter(hPrinter, 2, pAddr, cbNeeded, out cbNeeded);
                    if (bolRet)
                    {
                        PRINTER_INFO_2 Info2 = new PRINTER_INFO_2();
                        
                        Info2 = (PRINTER_INFO_2)Marshal.PtrToStructure(pAddr, typeof(PRINTER_INFO_2));
                        
                        intRet = System.Convert.ToInt32(Info2.Status);
                    }
                    Marshal.FreeHGlobal(pAddr);
                }
                ClosePrinter(hPrinter);
            }

            return intRet;
        }

        internal static PRINTER_INFO_2[] EnumPrintersByFlag(PrinterEnumFlags Flags)
        {
            uint cbNeeded = 0;
            uint cReturned = 0;
            bool ret = EnumPrinters( PrinterEnumFlags.PRINTER_ENUM_LOCAL, null, 2, IntPtr.Zero, 0, ref cbNeeded, ref cReturned);

            IntPtr pAddr = Marshal.AllocHGlobal((int)cbNeeded);
            ret = EnumPrinters(PrinterEnumFlags.PRINTER_ENUM_LOCAL, null, 2, pAddr, cbNeeded, ref cbNeeded, ref cReturned);

            if (ret)
            {
                PRINTER_INFO_2[] Info2 = new PRINTER_INFO_2[cReturned];

                int offset = pAddr.ToInt32();

                for (int i = 0; i < cReturned; i++)
                {
                    Info2[i].pServerName = Marshal.PtrToStringAuto(Marshal.ReadIntPtr(new IntPtr(offset)));
                    offset += 4;
                    Info2[i].pPrinterName = Marshal.PtrToStringAuto(Marshal.ReadIntPtr(new IntPtr(offset)));
                    offset += 4;
                    Info2[i].pShareName = Marshal.PtrToStringAuto(Marshal.ReadIntPtr(new IntPtr(offset)));
                    offset += 4;
                    Info2[i].pPortName = Marshal.PtrToStringAuto(Marshal.ReadIntPtr(new IntPtr(offset)));
                    offset += 4;
                    Info2[i].pDriverName = Marshal.PtrToStringAuto(Marshal.ReadIntPtr(new IntPtr(offset)));
                    offset += 4;
                    Info2[i].pComment = Marshal.PtrToStringAuto(Marshal.ReadIntPtr(new IntPtr(offset)));
                    offset += 4;
                    Info2[i].pLocation = Marshal.PtrToStringAuto(Marshal.ReadIntPtr(new IntPtr(offset)));
                    offset += 4;
                    Info2[i].pDevMode = Marshal.ReadIntPtr(new IntPtr(offset));
                    offset += 4;
                    Info2[i].pSepFile = Marshal.PtrToStringAuto(Marshal.ReadIntPtr(new IntPtr(offset)));
                    offset += 4;
                    Info2[i].pPrintProcessor = Marshal.PtrToStringAuto(Marshal.ReadIntPtr(new IntPtr(offset)));
                    offset += 4;
                    Info2[i].pDatatype = Marshal.PtrToStringAuto(Marshal.ReadIntPtr(new IntPtr(offset)));
                    offset += 4;
                    Info2[i].pParameters = Marshal.PtrToStringAuto(Marshal.ReadIntPtr(new IntPtr(offset)));
                    offset += 4;
                    Info2[i].pSecurityDescriptor = Marshal.ReadIntPtr(new IntPtr(offset));
                    offset += 4;
                    //Info2[i].Attributes = (uint)Marshal.ReadIntPtr(new IntPtr(offset));
                    //offset += 4;
                    /*
                    Info2[i].Attributes = (uint )Marshal.ReadIntPtr(new IntPtr(offset));
                    offset += 4;
                    Info2[i].Priority = (uint)Marshal.ReadInt32(new IntPtr(offset));
                    offset += 4;
                    Info2[i].DefaultPriority = (uint)Marshal.ReadInt32(new IntPtr(offset));
                    offset += 4;
                    Info2[i].StartTime = (uint)Marshal.ReadInt32(new IntPtr(offset));
                    offset += 4;
                    Info2[i].UntilTime = (uint)Marshal.ReadInt32(new IntPtr(offset));
                    offset += 4;
                    Info2[i].Status = (uint)Marshal.ReadInt32(new IntPtr(offset));
                    offset += 4;
                    Info2[i].cJobs = (uint)Marshal.ReadInt32(new IntPtr(offset));
                    offset += 4;
                    Info2[i].AveragePPM = (uint)Marshal.ReadInt32(new IntPtr(offset));
                    offset += 4;
                     * */

                }

                Marshal.FreeHGlobal(pAddr);

                return Info2;

            }
            else
            {
                return new PRINTER_INFO_2[0];
            }
        }
        
        /// <summary>
        /// Get the status of the selected printer
        /// </summary>
        public static string GetPrinterStatus(string PrinterName)
        {
            int intValue = GetPrinterStatusInt(PrinterName);
            string strRet = string.Empty;
            switch (intValue)
            {
                case 0:
                    strRet = "Ready";
                    break;
                case 0x00000200:
                    strRet = "Busy";
                    break;
                case 0x00400000:
                    strRet = "Printer Door Open";
                    break;
                case 0x00000002:
                    strRet = "Printer Error";
                    break;
                case 0x0008000:
                    strRet = "Initializing";
                    break;
                case 0x00000100:
                    strRet = "I/O Active";
                    break;
                case 0x00000020:
                    strRet = "Manual Feed";
                    break;
                case 0x00040000:
                    strRet = "No Toner";
                    break;
                case 0x00001000:
                    strRet = "Not Available";
                    break;
                case 0x00000080:
                    strRet = "Off Line";
                    break;
                case 0x00200000:
                    strRet = "Out of Memory";
                    break;
                case 0x00000800:
                    strRet = "Output Bin Full";
                    break;
                case 0x00080000:
                    strRet = "Page Punt";
                    break;
                case 0x00000008:
                    strRet = "Paper Jam";
                    break;
                case 0x00000010:
                    strRet = "Paper Out";
                    break;
                case 0x00000040:
                    strRet = "Page Problem";
                    break;
                case 0x00000001:
                    strRet = "Paused";
                    break;
                case 0x00000004:
                    strRet = "Pending Deletion";
                    break;
                case 0x00000400:
                    strRet = "Printing";
                    break;
                case 0x00004000:
                    strRet = "Processing";
                    break;
                case 0x00020000:
                    strRet = "Toner Low";
                    break;
                case 0x00100000:
                    strRet = "User Intervention";
                    break;
                case 0x20000000:
                    strRet = "Waiting";
                    break;
                case 0x00010000:
                    strRet = "Warming Up";
                    break;
                default:
                    strRet = "Unknown Status";
                    break;
            }
            return strRet;
        }
        
        /// <summary>
        /// Delete existed form
        /// </summary>
        public static void DeleteCustomPaperSize(string PrinterName, string PaperName)
        {
            const int PRINTER_ACCESS_USE = 0x00000008;
            const int PRINTER_ACCESS_ADMINISTER = 0x00000004;

            structPrinterDefaults defaults = new structPrinterDefaults();
            defaults.pDatatype = null;
            defaults.pDevMode = IntPtr.Zero;
            defaults.DesiredAccess = PRINTER_ACCESS_ADMINISTER | PRINTER_ACCESS_USE;

            IntPtr hPrinter = IntPtr.Zero;

            if (OpenPrinter(PrinterName, out hPrinter, ref defaults))
            {
                try
                {
                    DeleteForm(hPrinter, PaperName);
                    ClosePrinter(hPrinter);
                }
                catch
                {
                    
                     ww.wwf.wwfbll.WWMessage.MessageShowWarning("Error to delete existed form!");
                }
            }
        }
        
        /// <summary>
        /// Add a form
        /// </summary>
        public static void AddCustomPaperSize(string PrinterName, string PaperName, float WidthInMm, float HeightInMm)
        {
            if (PlatformID.Win32NT == Environment.OSVersion.Platform)
            {
                const int PRINTER_ACCESS_USE = 0x00000008;
                const int PRINTER_ACCESS_ADMINISTER = 0x00000004;
                //const int FORM_PRINTER = 0x00000002;

                structPrinterDefaults defaults = new structPrinterDefaults();
                defaults.pDatatype = null;
                defaults.pDevMode = IntPtr.Zero;
                defaults.DesiredAccess = PRINTER_ACCESS_ADMINISTER | PRINTER_ACCESS_USE;

                IntPtr hPrinter = IntPtr.Zero;

                if (OpenPrinter(PrinterName, out hPrinter, ref defaults))
                {
                    try
                    {
                        DeleteForm(hPrinter, PaperName);
                        FormInfo1 formInfo = new FormInfo1();
                        formInfo.Flags = 0;
                        formInfo.pName = PaperName;
                        formInfo.Size.width = (int)(WidthInMm * 1000.0);
                        formInfo.Size.height = (int)(HeightInMm * 1000.0);
                        formInfo.ImageableArea.left = 0;
                        formInfo.ImageableArea.right = formInfo.Size.width;
                        formInfo.ImageableArea.top = 0;
                        formInfo.ImageableArea.bottom = formInfo.Size.height;
                        if (!AddForm(hPrinter, 1, ref formInfo))
                        {
                            StringBuilder strBuilder = new StringBuilder();
                            strBuilder.AppendFormat("Failed! Error code:{2}",
                                PaperName, PrinterName, GetLastError());
                            throw new ApplicationException(strBuilder.ToString());
                        }

                        const int DM_OUT_BUFFER = 2;
                        const int DM_IN_BUFFER = 8;
                        structDevMode devMode = new structDevMode();
                        IntPtr hPrinterInfo, hDummy;
                        PRINTER_INFO_9 printerInfo;
                        printerInfo.pDevMode = IntPtr.Zero;
                        int iPrinterInfoSize, iDummyInt;


                        int iDevModeSize = DocumentProperties(IntPtr.Zero, hPrinter, PrinterName, IntPtr.Zero, IntPtr.Zero, 0);

                        if (iDevModeSize < 0)
                            throw new ApplicationException("Cannot get the size of the DEVMODE struct!");

                        IntPtr hDevMode = Marshal.AllocCoTaskMem(iDevModeSize + 100);

                        int iRet = DocumentProperties(IntPtr.Zero, hPrinter, PrinterName, hDevMode, IntPtr.Zero, DM_OUT_BUFFER);

                        if (iRet < 0)
                            throw new ApplicationException("Cannot get the DEVMODE Struct!");

                        devMode = (structDevMode)Marshal.PtrToStructure(hDevMode, devMode.GetType());


                        devMode.dmFields = 0x10000;

                        devMode.dmFormName = PaperName;

                        Marshal.StructureToPtr(devMode, hDevMode, true);

                        iRet = DocumentProperties(IntPtr.Zero, hPrinter, PrinterName,
                                 printerInfo.pDevMode, printerInfo.pDevMode, DM_IN_BUFFER | DM_OUT_BUFFER);

                        if (iRet < 0)
                            throw new ApplicationException("Cannot set the orientation!");

                        GetPrinter(hPrinter, 9, IntPtr.Zero, 0, out iPrinterInfoSize);
                        if (iPrinterInfoSize == 0)
                            throw new ApplicationException(" Call GetPrinter failed!");

                        hPrinterInfo = Marshal.AllocCoTaskMem(iPrinterInfoSize + 100);

                        bool bSuccess = GetPrinter(hPrinter, 9, hPrinterInfo, iPrinterInfoSize, out iDummyInt);

                        if (!bSuccess)
                            throw new ApplicationException("Call GetPrinter failed!");

                        printerInfo = (PRINTER_INFO_9)Marshal.PtrToStructure(hPrinterInfo, printerInfo.GetType());
                        printerInfo.pDevMode = hDevMode;

                        Marshal.StructureToPtr(printerInfo, hPrinterInfo, true);

                        bSuccess = SetPrinter(hPrinter, 9, hPrinterInfo, 0);

                        if (!bSuccess)
                            throw new Win32Exception(Marshal.GetLastWin32Error(), "Call GetPrinter failed!");

                        SendMessageTimeout(
                           new IntPtr(HWND_BROADCAST),
                           WM_SETTINGCHANGE,
                           IntPtr.Zero,
                           IntPtr.Zero,
                           Printer.SendMessageTimeoutFlags.SMTO_NORMAL,
                           1000,
                           out hDummy);
                    }
                    finally
                    {
                        ClosePrinter(hPrinter);
                    }
                }
                else
                {
                    StringBuilder strBuilder = new StringBuilder();
                    strBuilder.AppendFormat("Cannot open prnter {0}, Error Code: {1}",
                        PrinterName, GetLastError());
                    throw new ApplicationException(strBuilder.ToString());
                }
            }
            else
            {
                structDevMode pDevMode = new structDevMode();
                IntPtr hDC = CreateDC(null, PrinterName, null, ref pDevMode);
                if (hDC != IntPtr.Zero)
                {
                    const long DM_PAPERSIZE = 0x00000002L;
                    const long DM_PAPERLENGTH = 0x00000004L;
                    const long DM_PAPERWIDTH = 0x00000008L;
                    pDevMode.dmFields = (int)(DM_PAPERSIZE | DM_PAPERWIDTH | DM_PAPERLENGTH);
                    pDevMode.dmPaperSize = 256;
                    pDevMode.dmPaperWidth = (short)(WidthInMm * 1000.0);
                    pDevMode.dmPaperLength = (short)(HeightInMm * 1000.0);
                    ResetDC(hDC, ref pDevMode);
                    DeleteDC(hDC);
                }
            }
        }

        /// <summary>
        /// Get the list of local printers
        /// </summary>
        public static System.Collections.ArrayList GetPrinterList()
        {
            System.Collections.ArrayList alRet = new System.Collections.ArrayList();
            PRINTER_INFO_2[] Info2 = EnumPrintersByFlag(PrinterEnumFlags.PRINTER_ENUM_LOCAL);
            for (int i = 0; i < Info2.Length; i++)
            {
                alRet.Add(Info2[i].pPrinterName);
            }
            return alRet;
        }
        
        
        /// <summary>
        /// Get the name of the default printer
        /// </summary>
        public static string GetDeaultPrinterName()
        {
            StringBuilder dp = new StringBuilder(256);
            int size = dp.Capacity;
            if (GetDefaultPrinter(dp, ref size))
            {
                return dp.ToString();
            }
            else
            {
                int rc = GetLastError();
               
                 ww.wwf.wwfbll.WWMessage.MessageShowWarning("Failed to get default printer!Error code:" + rc.ToString());
                return string.Empty;
            }
        }

        
        /// <summary>
        /// Set default printer
        /// </summary>
        public static void SetPrinterToDefault(string PrinterName)
        {
            SetDefaultPrinter(PrinterName);
        }

        /// <summary>
        /// Whether the specific printer is in available printer list
        /// </summary>
        public static bool PrinterInList(string PrinterName)
        {
            bool bolRet = false;
            
                System.Collections.ArrayList alPrinters = GetPrinterList();

                for (int i = 0; i < alPrinters.Count; i++)
                {
                    try
                    {
                        if (PrinterName == alPrinters[i].ToString())
                        {
                            bolRet = true;
                            break;
                        }
                    }
                    catch { }
                }
                bolRet = true;
                alPrinters.Clear();
                alPrinters = null;
            
            return bolRet;
        }

        /// <summary>
        /// Whether the specific form is in the selected printer
        /// </summary>
        public static bool FormInPrinter(string PrinterName, string PaperName)
        {
            bool bolRet = false;

            System.Drawing.Printing.PrintDocument pd = new System.Drawing.Printing.PrintDocument();

            pd.PrinterSettings.PrinterName = PrinterName;

            foreach (System.Drawing.Printing.PaperSize ps in pd.PrinterSettings.PaperSizes)
            {
                if (ps.PaperName == PaperName)
                {
                    bolRet = true;
                    break;
                }
            }

            pd.Dispose();

            return bolRet;
        }

        /// <summary>
        /// Whether pageheight and pagewidth of the form are same with the specific ones
        /// </summary>
        public static bool FormSameSize(string PrinterName, string FormName, decimal Width, decimal Height)
        {
            bool bolRet = false;

            System.Drawing.Printing.PrintDocument pd = new System.Drawing.Printing.PrintDocument();

            pd.PrinterSettings.PrinterName = PrinterName;

            foreach (System.Drawing.Printing.PaperSize ps in pd.PrinterSettings.PaperSizes)
            {
                if (ps.PaperName == FormName)
                {
                    decimal decWidth = FromInchToCM(System.Convert.ToDecimal(ps.Width));
                    decimal decHeight = FromInchToCM(System.Convert.ToDecimal(ps.Height));
                    
                    if ( System.Math.Round(decWidth, 0) == System.Math.Round(Width, 0) && System.Math.Round(decHeight, 0) == System.Math.Round(Height, 0))
                        bolRet = true;
                    break;
                }
            }

            pd.Dispose();

            return bolRet;
        }
        
        /// <summary>
        /// Convert inch to cm
        /// 1 inch = 2.5400 cm
        /// </summary>
        public static decimal FromInchToCM(decimal inch)
        {
            return Math.Round((System.Convert.ToDecimal((inch / 100)) * System.Convert.ToDecimal(2.5400)), 2);
        }



    }
}